I looked at Amazon and they stock suitable waveform generators from $30 on up.

The Koolertron GH-CJDS66 covers 1Hz to 15MHz with an output of up to 20V P-P open circuit. Into 50 ohms its output is 10V P-P.

https://www.amazon.com/Koolertron-Generator-Precision-Dual-channel-Arbitrary/dp/B07211YWMK/ref=bmx\_dp\_h02w2ton\_4/146-7941575-9029665?pd\_rd\_w=isYwz&pf\_rd\_p=862b4b8b-7a18-40e3-a54d-9d43f8d57f92&pf\_rd\_r=JM95PGK7KF3RR0M39RT6&pd\_rd\_r=3aa7d5c7-bdf4-4c5d-888a-78ed40b1ab1b&pd\_rd\_wg=MkDLb&pd\_rd\_i=B07211YWMK&psc=1